My name is Penina McMahon and I focus my practice on all areas of family law, including divorce, post-divorce, parenting rights and responsibilities, child support, alimony, adoption, and guardianships. In addition, I handle estate planning, and probate and trust administration cases.

After law school, I worked for several years in Philadelphia where I focused my practice on complex criminal defense appeals in State and Federal Courts. My clients faced life imprisonment and the death penalty, and I developed a deep understanding of the impact the legal system can have on a person and their family. When I moved back to New Hampshire, I transitioned my practice to family law. I appreciate helping my clients navigate these challenging and emotional cases through our complex legal system. I am proud to act as both a teacher, educating my clients about the legal process and their rights, and as an advocate, pushing for the best result for my clients and their family.

I attended Plymouth State University where I received a Bachelor of the Arts Degree in Criminal Justice with minors in Pre-Law and Anthropology/Sociology. I received my law degree from the University of New Hampshire Franklin Pierce School of Law (formerly known as Franklin Pierce Law Center). During law school, I was a member of the Daniel Webster Scholars Program: an innovative honors program focused on creating practice-ready lawyers by utilizing a hands-on learning approach. I also received two awards for my work in public service with the Division for Children, Youth & Families and New Hampshire Legal Assistance.

General Information

  • Licensed to practice in New Hampshire
  • Member of the New Hampshire Bar Association
  • Certified Collaborative Divorce Attorney
  • New Hampshire Notary


  • New Hampshire Bar Association
  • Pennsylvania Bar Association (Inactive)
  • Third Circuit Court of Appeals

Professional Associations

“As your legal advocate, I will always push for the best result for you and your family.”




These recognitions both testify to our firm’s longstanding dedication to excellence, and motivate us in our continued pursuit of nothing less than the best for our clients. Here at Morneau Law, we combine this quantifiable expertise with award-winning professional ability in our approach to every new case in order to bring our clients outstanding legal representation.